Optimal control of effluents using the adjoint method
In: Wasser und Boden, Jg. 55 (2003), Heft 3, S. 37-41
academicJournal
- print, 16 ref
Zugriff:
A method is presented to compute sensitivities of instream dissolved oxygen (DO) with respect to carbonaceous biological oxygen demand (CBOD) loadings in a well-mixed stream. The utilization of the adjoint methodology proves to be an extremely efficient way to compute these sensitivities. The sensitivities are coupled with a gradient-based search algorithm that seeks to optimize CBOD loadings such that in-stream DO concentrations do not fall short of required minimum levels as stipulated for environmental protection. Time-variant discharge rates for a number of discharge locations are considered as control parameters, while zone-specific critical DO levels are imposed as constraints. Computations are carried out using a 2D model formulation applied to an estuarine system (upper Potomac River) for a simulation time of 6 days. The chosen scenario is intended to investigate an alternative solution to the proposed one, which seeks to store CSO effluent in large tunnels for later treatment. As an alternative the algorithm optimizes the loadings of two CSO outfalls in conjunction with a specified WWTP discharge to control degradable organic matter that adversely affects in-stream DO levels.
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Optimal control of effluents using the adjoint method
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Autor/in / Beteiligte Person: | PIASECKI, Michael |
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Zeitschrift: | Wasser und Boden, Jg. 55 (2003), Heft 3, S. 37-41 |
Veröffentlichung: | Heidelberg: Springer, 2003 |
Medientyp: | academicJournal |
Umfang: | print, 16 ref |
ISSN: | 0043-0951 (print) |
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